Key to Alien Classification
1. a. Creature has a wide head___________________ go to 2
b. Creature has a narrow head_________________ go to 3
2. a. Creature has two eyes_____________________ go to 4
b. Creature has three eyes____________________ go to 5
3. a. Creature has one eye______________________ Creature 11
b. Creature has two eyes_____________________ go to 6
4. a. Creature has no star on its chest_____________ go to 7
b. Creature has a star on its chest______________ Creature 12
5. a. Creature has no star on its chest_____________ go to 8
b. Creature has a star on its chest______________ go to 9
6. a. Creature has no antennas___________________ go to 10
b. Creature has antennas_____________________ go to 11
7. a. Creature has no hairy spikes_________________ go to 12
b. Creature has hairy spikes___________________ go to 13
8. a. Creature has a M-shaped bottom____________ Creature 18
b. Creature has an Arch-shaped bottom_________ Creature 15
9. a. Creature has no hairy spikes_________________ go to 14
b. Creature has hairy spikes___________________ Creature 5
10. a. Creature has no hairy spikes_________________ go to 15
b. Creature has hairy spikes___________________ Creature 19
11. a. Creature has no hairy spikes_________________ go to 16
b. Creature has hairy spikes___________________ go to 17
12. a. Creature has a M-shaped bottom____________ Creature 14
b. Creature has an Arch-shaped bottom_________ Creature 6
13. a. Creature has a M-shaped bottom____________ Creature 16
b. Creature has an Arch-shaped bottom_________ Creature 4
14. a. Creature has a M-shaped bottom____________ Creature 10
b. Creature has an Arch-shaped bottom_________ Creature 2
15. a. Creature has no fuzzy hair__________________ Creature 9
b. Creature has fuzzy hair_____________________ Creature 17
16. a. Creature has no fuzzy hair__________________ go to 18
b. Creature has fuzzy hair_____________________ go to 19
17. a. Creature has hairy spikes around face_________ Creature 20
b. Creature has hairy spikes around on face______ Creature 13
18. a. Creature has no mouth_____________________ Creature 8
b. Creature has a mouth______________________ Creature 3
19. a. Creature has no mouth ____________________ Creature 7
b. Creature has a mouth______________________ Creature 1